Combined heater and exhaust manifold



y 1931. R. B. OTWELL 1,803,436

COMBINED HEATER AND EXHAUST MANIFOLD Filed Oct. 29, 1929 2 Sheets-Sheet 1 ATTORNEY y 1931- YR. B. OTWELL 1,803,436-

COMBINED HEATER AND EXHAUST MANIFOLD Filed Oct. 29, 1929 2 Sheets-Sheet 2 2 a lgVENTOR BY m ' ATTORNEY Patented May 5, 1931 UNITED STATES PATENT OFFICE- RALPH B. OTW ELL, 015 DETROIT, MICHIGAN COMBINED HEATER AND EXHAUST MANIFOLD Application filed October 29, 1929. Serial No. 403,203.

ing the heater and exhaust manifold to seryice certain adjacent and other parts of the power unit, when removing said parts, or making repairs. v

A furtherobject of the invention is to increase the heating surface of the device while maintaining the present prescribed length of manifold, through the use of a plurality of vertical-waVe-like partition walls spaced apart within the heating chamber and integral with the upper and lower walls of said chamber, also by a plurality of fins, integral with and depending from the wall dividing the heating chamber from the exhaust chamber, said walls, partitions and fins having an 2 undulating or wave-like contour, thereby materially increasing the heating surface over which the air passes on its way to the body of the vehicle. A further object of the present invention is so to so form the exhaust manifold that it may project downwardly between and adjacent to the branchkes of the intake manifold leading from the arburetor to the respective cylinders of the engine that the incoming gas may be heated before entering the several cylinders.

A further object of the invention is to so construct the device that it rovides ready access to the oiler of the distri utor and other adjacent parts of the power unit thereby avoiding any. unnecessary expenditure of time and effort to reach these and other parts I A further object of the invention is the removable exp ansible tube connection employed between the heater and the register, also the register assembly, including its shut-ofi cover and adjustable deflector.

With the foregoing and other objects in view which will appear as the description proceeds, the invention further resides in the combination and arrangement of parts and in the details of construction hereinafter described and claimed, it being understood that changes may be made in the precise embodiment of the invention herein disclosed without departing from the spirit of. the same.

In the drawings accompanying this specification:

Figure 1 is a side elvation of the combined heater and exhaust manifold, with parts broken away and in section, showing the undulating outer and dividing wall and the partition walls and fins, of the heating chamber and exhaust manifold; also in dotted lines, the register assembly and the removable expansion tube connection between the heater and register.

Figure 2 is a plan view of the device with a portion of the upper wall broken away disclosing incross-section a plurality of spaced partition walls.

Figure 3 is a cross-sectional View taken on or about line 3-3 of Figure 1.

Figure 4 is a rear end elevation of the combined manifold and heater.

Figure 5 is a front end elevation of the same.

Figure 6 is a ister assembly.

Figure 7 is a perspective view of a detail of the,. xpansible tube, connecting the heater with the; register assembly. Figure 8 is a pers ective view of the engine, the intake manif perspective view of the regshowing the relation of the latter to the inlet manifold alsothe distributor and adjacent parts.

Referring now to the letters of reference placed upon the drawings in which the same characters indicate like parts in the several views:

A denotes the engine of a. motor vehicle. B the carburetor, C the intake manifold. D indicates the timer or distributor of the power plant and D an oiler for same. E indicates a combined heater and exhaust manifold consisting of an integral cast-metal unit,

its upper wall e, lower wall e and the intermediate Wall e dividing the heating and exold, the distributorand the combined exhaust manifold and'heater,

haust chambers having an undulating or wave-like form whereby the heating surface is enlarged and that the device may straddle and extend downwardly between the connections leading from the inlet manifold to the engine. Bridging the upper heating chamber F, are a plurality of integral verti cal partition walls Ff, which conform to the wave-like form of the inclosing walls, spaced apart to provide air ducts through which fresh air heated in its passage through the chamber is forced into the body of the vehicle by a fan (not shown) forming part of the usual power plant installation.

Projecting downwardly from the horizontal dividing wall 6 into the exhaust manifold G, are a plurality of fins g integral with the horizontal dividing wall'and conforming to its undulating or wave-like outline that it may also increase the heating surface of the device. I

While the primary object of the undulating wave-like construction is to materially increase the heating surface of the device within a certain prescribed length, the extent of which is controlled by proximity of the device to other parts of the power plant, it also has for its object a construction in which greater accessibility may be had for inspection, removal and repairs of adjacent parts of the power plant, thereby avoiding the necessity for the removal of the exhaustheater manifold for this purpose and thus effecting a saving of both time and money..

Upon reference to Figure 8 it will be noted that the wave-like contour of the heatermanifold, provides in a marked degree ready accessibility to the timer-distributor for oiling, adjustment or repairs.

The forward end of the heating chamber F is constructed .with a funnel-shaped opening F to receive the fresh, cool, outer air, put in circulation by the forward movement of the car or driven by the usual fan (not shown) used in connection with the cooling system of the power plant.

Fitted in the opposite open end of the heating chamber is a collapsible tube H, consisting of a strip of sheet metal coiled so that its edges h-h overlap to form an expansible tube see Figures 6 and 7providing a connection between the heater and hot air register assembly I, mounted in a suitable hole cut in the dash of the motor vehicle.

By providing an expansible tube for connecting the heater with the register at least three desirable results are obtained :first, the expanding action of the tube insures against the parts rattling in transit, second, when itis desired to disconnect the heater from the register-as for example during the summer months-the tube may be readily compressed and withdrawn, and third, its inherent flexibility compensates for any misalignment between the heater and register.

The register assembly 1, consists of a flanged casing J, secured to a collar K extending through an opening in the vehicle dash L, to receive the expansible and collapsible tube H, connected with the open end of the air heating chamber.

M is a swinging cover governing the delivery of heated air into the car, fitted with a lug M for manually operating same. The cover is pivoted upon a bolt- N projecting through the wall of the dash to secure the cover in vposition. Also pivoted upon the bolt N, is an arcuate deflector P which may be turned on its pivot that the heated air may be delivered in any desired direction.

Q indicates a spring sleeved on the bolt N, and bearing against the cover M and de flector P to insure against the rattling of these parts in transit.

Having now indicated the several parts by reference letters the construction and operation of the device will be readily understood.

\Vhen it is desired to heat the vehicle, the cover M, closing the opening through the register, is opened that the air warmed as it passes through the heating chamber of the device may pass to the body of the car. If the occupant of the car desires to direct the heated air in a particular direction he has only to adjust the deflector P accordingly, to obtain the desired result.

Having thus described my invention, what I claim is:

1. In a combined heater and exhaust manifold of the character described, a casing comprising undulating wave-like top, bottom, and a longitudinally extending dividing wall, cast integral with a pair of flat side Walls, forming respectively an air heating chamber and an exhaust manifold and whereby the heating surface is relatively increased within' a given length by said wave-like walls,

said air chamber being divided longitudinally by a plurality of partition walls cast integral with the undulating wave-like top and dividing walls.

2. In a combined heater and exhaust manifold" of the character described, a casing comprising undulating wave-like top, bottom, and a longitudinally extending dividin wall, cast integral with a pair of flat side wa ls, forming respectively an air heating chamber and an exhaust manifold and whereby the air heating surface is increased within a given length by said wave-like walls; a plurality of partition walls integral with and conforming to the undulating wave-like top and dividing walls of the air chamber;

and a plurality of vertical, longitudinally extending fins projecting into the exhaust chamber, cast integral with the said undulating wave-like dividing wall.

3. In a combined heater and exhaust manifoldof the character described, a casing comprislng undulating Wave-like top, bottom,

and longitudinally extendin dividing walls cast integral with a pair flat side walls, forming respectively an air heating chamber and an exhaust manifold and whereby the heating surface is increased within a given length by said wave-like walls, a plurality of vertical longitudinally extending part1- tion Walls cast inte al with the undulating. wave-like top and ividing walls of the air chamber; a plurality of vertical, longitudinally extending fins, cast integral with said dividing wall and projecting into the exhaust chamber; and means for controlling the delivery of the heated-air to the body of the vehicle.

4. In a combined heater and exhaust manifold; an air heating chamber extending 1ongitudinally adjacent the exhaust manifold; a

. register unit, adapted to be supported in the Wall of a vehicle dash, and a collapsible tube formed of sheet metal with overlapping edges, adapted to connect the air heating chamber with the register unit.

5. In a combined heater and exhaust mani- 23 fold, an air heating chamber extending longitudinally adjacent the exhaust manifold; a register unit connected with the air chamber, adapted to be supported in the dash of a vehicle, said register unit comprising a flanged casing forming an air duct; a cover plate pivoted to a bolt extending through the flange of the casing, adapted to close the air duct through said casing; an arcuate deflector also pivoted to said bolt; and a'spring coiled on the bolt and bearing against the cover plate and deflector, whereby said parts pivoted upon the bolt are held against rattling.

In testimony whereof, I sign this specifi- 40 cation.

RALPH B. OTWELL. 

